The caption for the image reads simply enough: “Protected areas with major ape populations.” But it took me a moment to absorb exactly what the image was communicating. The grey area represents the range of the gorilla; the outlined regions indicate protected areas (as per the caption). The color of the protected areas is tan if unaffected by ebola, or in the range from white to dark blue depending on the year of the outbreak(s). For some reason, I found this initially unclear.